From b71e69182ebad90e052180654b6b9e564983e704 Mon Sep 17 00:00:00 2001
From: RachelElysia <71795832+RachelElysia@users.noreply.github.com>
Date: Thu, 4 Sep 2025 14:18:11 -0400
Subject: [PATCH] Fleet UI: Add last opened tooltip (#32592)

---
 .../details/cards/Software/HostSoftware.tsx   |  3 ++-
 .../Software/HostSoftwareTableConfig.tsx      | 20 ++++++++++++++++++-
 .../InventoryVersions/InventoryVersions.tsx   | 20 ++++++++++++++++++-
 3 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/frontend/pages/hosts/details/cards/Software/HostSoftware.tsx b/frontend/pages/hosts/details/cards/Software/HostSoftware.tsx
index 1570c80b1f..5211b0233b 100644
--- a/frontend/pages/hosts/details/cards/Software/HostSoftware.tsx
+++ b/frontend/pages/hosts/details/cards/Software/HostSoftware.tsx
@@ -258,8 +258,9 @@ const HostSoftware = ({
           router,
           teamId: hostTeamId,
           onShowInventoryVersions,
+          platform,
         });
-  }, [isMyDevicePage, router, hostTeamId, onShowInventoryVersions]);
+  }, [isMyDevicePage, router, hostTeamId, onShowInventoryVersions, platform]);
 
   const isLoading = isMyDevicePage
     ? deviceSoftwareLoading
diff --git a/frontend/pages/hosts/details/cards/Software/HostSoftwareTableConfig.tsx b/frontend/pages/hosts/details/cards/Software/HostSoftwareTableConfig.tsx
index 55ae5e6c95..4dbb2dd766 100644
--- a/frontend/pages/hosts/details/cards/Software/HostSoftwareTableConfig.tsx
+++ b/frontend/pages/hosts/details/cards/Software/HostSoftwareTableConfig.tsx
@@ -8,6 +8,7 @@ import {
   isIpadOrIphoneSoftwareSource,
   SoftwareSource,
 } from "interfaces/software";
+import { HostPlatform, isLinuxLike } from "interfaces/platform";
 import { IHeaderProps, IStringCellProps } from "interfaces/datatable_config";
 
 import PATHS from "router/paths";
@@ -18,6 +19,7 @@ import TextCell from "components/TableContainer/DataTable/TextCell";
 import SoftwareNameCell from "components/TableContainer/DataTable/SoftwareNameCell";
 import InstalledPathCell from "pages/SoftwarePage/components/tables/InstalledPathCell";
 import HashCell from "pages/SoftwarePage/components/tables/HashCell/HashCell";
+import TooltipWrapper from "components/TooltipWrapper";
 import { HumanTimeDiffWithDateTip } from "components/HumanTimeDiffWithDateTip";
 
 import VulnerabilitiesCell from "pages/SoftwarePage/components/tables/VulnerabilitiesCell";
@@ -40,6 +42,7 @@ interface ISoftwareTableHeadersProps {
   router: InjectedRouter;
   teamId: number;
   onShowInventoryVersions: (software: IHostSoftware) => void;
+  platform: HostPlatform;
 }
 
 // NOTE: cellProps come from react-table
@@ -48,6 +51,7 @@ export const generateSoftwareTableHeaders = ({
   router,
   teamId,
   onShowInventoryVersions,
+  platform,
 }: ISoftwareTableHeadersProps): ISoftwareTableConfig[] => {
   const tableHeaders: ISoftwareTableConfig[] = [
     {
@@ -121,7 +125,21 @@ export const generateSoftwareTableHeaders = ({
     },
     {
       Header: (): JSX.Element => {
-        return <HeaderCell value="Last opened" disableSortBy />;
+        const lastOpenedHeader = isLinuxLike(platform) ? (
+          <TooltipWrapper
+            tipContent={
+              <>
+                The last time the package was opened by the end user <br />
+                or accessed by any process on the host.
+              </>
+            }
+          >
+            Last opened
+          </TooltipWrapper>
+        ) : (
+          "Last opened"
+        );
+        return <HeaderCell value={lastOpenedHeader} disableSortBy />;
       },
       id: "Last opened",
       disableSortBy: true,
diff --git a/frontend/pages/hosts/details/components/InventoryVersions/InventoryVersions.tsx b/frontend/pages/hosts/details/components/InventoryVersions/InventoryVersions.tsx
index c3907f28e0..cc28f46372 100644
--- a/frontend/pages/hosts/details/components/InventoryVersions/InventoryVersions.tsx
+++ b/frontend/pages/hosts/details/components/InventoryVersions/InventoryVersions.tsx
@@ -4,6 +4,7 @@ import { dateAgo } from "utilities/date_format";
 
 import {
   formatSoftwareType,
+  INSTALLABLE_SOURCE_PLATFORM_CONVERSION,
   IHostSoftware,
   ISoftwareInstallVersion,
   SoftwareSource,
@@ -11,6 +12,7 @@ import {
 
 import Card from "components/Card";
 import DataSet from "components/DataSet";
+import TooltipWrapper from "components/TooltipWrapper";
 
 export const sourcesWithLastOpenedTime = new Set([
   "programs",
@@ -52,6 +54,22 @@ const InventoryVersion = ({
     signature_information: signatureInformation,
   } = version;
 
+  const lastOpenedTitle =
+    INSTALLABLE_SOURCE_PLATFORM_CONVERSION[source] === "linux" ? (
+      <TooltipWrapper
+        tipContent={
+          <>
+            The last time the package was opened by the end user <br />
+            or accessed by any process on the host.
+          </>
+        }
+      >
+        Last opened
+      </TooltipWrapper>
+    ) : (
+      "Last opened"
+    );
+
   return (
     <Card
       className={`${baseClass}__version`}
@@ -66,7 +84,7 @@ const InventoryVersion = ({
         )}
         {version.last_opened_at || sourcesWithLastOpenedTime.has(source) ? (
           <DataSet
-            title="Last opened"
+            title={lastOpenedTitle}
             value={
               version.last_opened_at ? dateAgo(version.last_opened_at) : "Never"
             }